This standard covers the various types and classes of cold water fire service type meters in sizes 3 in. (80 mm) through 10 in. (250 mm) and the materials and workmanship used in their fabrication. A fire-service meter shall consist of one of the following:
A combination of (1) a mainline meter of the turbine type (Class II), either Underwriters Laboratories listed or Factory Mutual Research approved; (2) either a UL-listed or an FM-approved...